TypeError: unsupported operand type(s) for +: 'int' and 'RowProxy'

Question

此视图的目的是通过一些计算从 goodread.com 和我的数据库读取后提取 return 为 JSON 格式。

我尝试了很多方法来渲染 API 但仍然没有希望

我尝试在每个列出的 SQL 查询中查询时将用户输入 oneIsbn 更改为 'oneIsbn'。我在浏览器上得到的是这样的

{ "Error": "Invalid ISBN 0380795272" }

我的代码片段

@app.route("/api/<oneIsbn>", methods=["GET", "POST"])
@login_required
def api(oneIsbn):
    """Returns in JSON format for a single Book"""

    if request.method == "GET":

        check = db.execute("SELECT * FROM books WHERE isbn= :isbn",
                           {"isbn": oneIsbn}).fetchone()
        if check is None:
               return jsonify({"Error": f"Invalid ISBN {oneIsbn}"}), 405
        else:
            res = requests.get(
                "https://www.goodreads.com/book/review_counts.json",
                params={
                    "key": "x9fJg",
                    "isbns": oneIsbn})
            if res.status_code != 200:
                raise Exception("ERROR: API request unsuccessful.")
            else:
                data = res.json()
                y = data["books"][0]["work_reviews_count"]
                r = data["books"][0]["average_rating"]

            isbn = db.execute("SELECT isbn FROM books WHERE isbn = :isbn",
                                {"isbn": oneIsbn}).fetchone()
            title = db.execute("SELECT title FROM books WHERE isbn = :isbn",
                                {"isbn": oneIsbn}).fetchone()
            author = db.execute("SELECT author FROM books WHERE isbn = :isbn",
                                {"isbn": oneIsbn}).fetchone()
            year = db.execute("SELECT year FROM books WHERE isbn = :isbn",
                                {"isbn": oneIsbn}).fetchone()
            x = db.execute("SELECT COUNT(reviews) FROM reviews WHERE isbn = :isbn",
                                    {"isbn": 'oneIsbn'}).fetchone()
            z = db.execute("SELECT rating FROM reviews WHERE isbn = :isbn",
                                    {"isbn": oneIsbn}).fetchone()

            rev = int(y)
            revCount = int(x.count)
            bothReviewValue = sum((revCount,rev))

            # listRate = float(z)
            rat = float(r)
            bothRatingValue = sum([z,rat]) / 2

            return jsonify(
                ISBN=isbn,
                TITLE=title,
                AUTHOR=author,
                YEAR=year,
                REVIEWS=bothReviewValue,
                RATING=bothRatingValue
                ), 422

回溯

TypeError
TypeError: unsupported operand type(s) for +: 'int' and 'RowProxy'

Traceback (most recent call last)
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 2464, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 2450, in wsgi_app
response = self.handle_exception(e)
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 1867, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\_compat.py", line 39, in reraise
raise value
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\_compat.py", line 39, in reraise
Open an interactive python shell in this frameraise value
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Users\Beacon\AppData\Local\Programs\Python\Python38\Lib\site-packages\flask\app.py", line 1936, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\Users\Beacon\Desktop\THINKFUL DOCS\PYTHON\PYTHON WORKSPACE\project1\application.py", line 39, in wrapped_view
return view(**kwargs)
File "C:\Users\Beacon\Desktop\THINKFUL DOCS\PYTHON\PYTHON WORKSPACE\project1\application.py", line 233, in api
bothRatingValue = sum([z,rat]) / 2
TypeError: unsupported operand type(s) for +: 'int' and 'RowProxy'
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Answer 1

我用的这个方法真的很管用。我已经错过了

sum method 应该放在 tuple 而不是 list 并且提取的 string 比率应该转换为 float.

            rev = int(y)
            revCount = int(x.count)
            bothReviewValue = sum((revCount,rev))

            listRate = float(z)
            rat = float(r)
            bothRatingValue = sum((listRate,rat)) / 2

TypeError: unsupported operand type(s) for +: 'int' and 'RowProxy'

TypeError: unsupported operand type(s) for +: 'int' and 'RowProxy'

postgresql

flask

adminer